It is possible to utilize RFA (Revit Family) data in the GenerativeComponents Extension when it is installed on AECOsim Building Designer. The linked video shows the process of using the "Bentley RFA Interpreter Wizard" to load an RFA file into the ABD DataGroup system. After this step it may be necessary to restart the application (ABD + GC) so that this change in the DataGroup data is properly loaded into GC's CatalogItem browser which feeds into the CatalogItem input property on the BuildingContent node type.